input: Fix running the completion callback for telemetry gesture.

content/browser/renderer_host/render_widget_host_impl.cc

Index: content/browser/renderer_host/render_widget_host_impl.cc
diff --git a/content/browser/renderer_host/render_widget_host_impl.cc b/content/browser/renderer_host/render_widget_host_impl.cc
index cf67ed51b1907f4beb539e2d97585c5ea6c93e77..bd8f764fe2fba3851978fe2919cade995f24e718 100644
--- a/content/browser/renderer_host/render_widget_host_impl.cc
+++ b/content/browser/renderer_host/render_widget_host_impl.cc
@@ -1316,10 +1316,7 @@ void RenderWidgetHostImpl::QueueSyntheticGesture(
   if (!synthetic_gesture_controller_ && view_) {
     synthetic_gesture_controller_ =
         base::MakeUnique<SyntheticGestureController>(
-            view_->CreateSyntheticGestureTarget(),
-            base::Bind(
-                &RenderWidgetHostImpl::RequestBeginFrameForSynthesizedInput,
-                base::Unretained(this)));
+            this, view_->CreateSyntheticGestureTarget());
   }
   if (synthetic_gesture_controller_) {
     synthetic_gesture_controller_->QueueSyntheticGesture(
@@ -1864,13 +1861,6 @@ void RenderWidgetHostImpl::OnGpuSwapBuffersCompletedInternal(
   latency_tracker_.OnGpuSwapBuffersCompleted(latency_info);
 }
 
-void RenderWidgetHostImpl::RequestBeginFrameForSynthesizedInput(
-    base::OnceClosure begin_frame_callback) {
-  DCHECK(view_);
-  begin_frame_callback_ = std::move(begin_frame_callback);
-  view_->OnSetNeedsFlushInput();
-}
-
 void RenderWidgetHostImpl::OnRenderProcessGone(int status, int exit_code) {
   // RenderFrameHost owns a RenderWidgetHost when it needs one, in which case
   // it handles destruction.
@@ -2557,6 +2547,17 @@ void RenderWidgetHostImpl::RequestMojoCompositorFrameSink(
   renderer_compositor_frame_sink_ = std::move(client);
 }
 
+void RenderWidgetHostImpl::RequestBeginFrameForSynthesizedInput(
+    base::OnceClosure begin_frame_callback) {
+  DCHECK(view_);
+  begin_frame_callback_ = std::move(begin_frame_callback);
+  view_->OnSetNeedsFlushInput();
+}
+
+bool RenderWidgetHostImpl::HasGestureStopped() {
+  return !input_router_->HasPendingEvents();
+}
+
 void RenderWidgetHostImpl::SetNeedsBeginFrame(bool needs_begin_frame) {
   OnSetNeedsBeginFrames(needs_begin_frame);
 }